The origins of Ourense are inextricably linked to the era of the Roman Empire. The city was founded in the 1st century AD, and its emergence was predetermined by the presence of unique hot springs, known today as As Burgas. The Romans, who highly valued thermal culture, established a settlement here that became an important stronghold in the region.
There are two main theories regarding the origin of the city's name: from the Latin aquae urentes ("scalding waters") or from the word aurum (gold), as in ancient times the Miño River was rich in this precious metal.
The development of Ourense from a small settlement into a significant urban centre relied on several foundations, the most important of which was the construction of the Roman Bridge (Ponte Vella) across the Miño River. The bridge transformed the city into a key transport hub, connecting trade routes between important Roman cities — Bracara Augusta (Braga) and Asturica Augusta (Astorga). Thanks to the crossing and gold mining, the city quickly became a centre of commerce, attracting merchants and artisans.
By the early Middle Ages, Ourense had strengthened its position not only as a trading centre but also as a political one. In the 5th–6th centuries, during the Migration Period, the city became the capital of the Suebi Kingdom for a certain period. This granted it high administrative status and contributed to the development of early Christian culture and architecture, laying the foundation for future prosperity.